HIGH TEMPERATURE SUPERCONDUCTORS
Historical Background
¢ Kamerlingh Onnes, Dutch physicist in 1911
¢ Meissner and Ochsenfeld
¢ Niobium nitride-16k, in 1941
¢ Vanadium-silicon-17.5k in 1953
¢ First commercial superconducting wire-NbTI,in 1962
¢ BCS Theory in 1957 by Bardeen, Cooper and Schrieffer
¢ Josephson Effect in1962
¢ Organic superconductors in 1964
¢ HTS in 1986 by Muller & Bednorz
¢ Yr,Ba,Cu,O compound- 90k in 1987
¢ Latest ceramic superconductor,Tc=138k, comp ....etc

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please can you send me the follo0wing details of 520F resin and 758 hardner?

1. young modules
2. shear modules
3. poission ratio
4. density ....etc

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A Paper Presentation
On
HIGH TEMPERATURE SUPER CONDUCTORS
At
Presented By
CH.SUDHARSHAN RAO
04H75A0404
J.VIJAY KUMAR
03H71A0457
IV / IV E.C.E
D.V.R&Dr H.S MIC COLLEGE OF TECHNOLOGY,
KANCHIKACHERLA.
Krishna district, AP .

HIGH TEMPERATURE SUPER CONDUCTORS

ABSTRACT :

A substantial fraction of electricity is lost in the form of heat through resistance associated with the traditional conductors such as copper or aluminum. More than 15% of the world's generated electricity is los ....etc

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full seminar report on COMPOSITES IN HIGH TEMPERATURE APPLICATIONS ....etc

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sspecial materials for high temperature applications ....etc

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SUPERCONDUCTIVITY is the ability of certain materials to conduct electric current with no resistance and extremely low losses. This ability to carry large amounts of currents can be applied to electric power devices such as motors and generators and to electricity transmission in power lines. For example, superconductors can carry as much as 100 times the electricity ordinary copper or aluminium wires of same size.Scientists had been intrigued with the concept of superconductivity since its discovery in the early 1900?s, but the extreme low tem ....etc

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Definition

The fiber/matrix adhesion is most likely to control the overall mechanical behavior of fiber-reinforced composites. An interfacial reaction may result in various morphological modifications to polymer matrix microstructure in proximity to the fiber surface. The interactions between fiber and polymer matrix during thermal conditioning and thermal shock are important phenomena.

Thermal stresses were built-up in glass fiber reinforced epoxy composites by up-thermal shock cycles (negative to positive temperature exposure) for diff ....etc

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Thermal shock on interfacial adhesion of thermally conditioned Glass fiber/epoxy


The fiber/matrix adhesion is most likely to control the overall mechanical behavior of fiber-reinforced composites. An interfacial reaction may result in various morphological modifications to polymer matrix microstructure in proximity to the fiber surface. The interactions between fiber and polymer matrix during thermal conditioning and thermal shock are important phenomena.

Thermal stresses were built-up in glass ....etc

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Study of High Temperature Crack Initiation in Single Crystal


Because of their excellent high temperature characteristics, Ni-based single-crystal alloys are used in applications where operating temperatures exceed 900ºC. The initiation of cracks under these conditions is generally associated with micro-scale porosities (typically between 10 and 20 microns). A rate-dependent crystallographic constitutive model in conjunction with a mass diffusion model has been used to study crack initiation in single crystal nickel-base superalloys ....etc

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Because of their excellent high temperature characteristics, Ni-based single-crystal alloys are used in applications where operating temperatures exceed 900ºC. The initiation of cracks under these conditions is generally associated with micro-scale porosities (typically between 10 and 20 microns). A rate-dependent crystallographic constitutive model in conjunction with a mass diffusion model has been used to study crack initiation in single crystal nickel-base superalloys, exposed to an oxidizing environment and subjected to ....etc

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